DE2930896A1 - TAPE DEVICE - Google Patents

Description

PATENT LAWYERS J. REITSTÖTTER W. KINZEBACH

PROF. DR. DR. DIPL .. INO. DR. PHIL. DIPL. CHBM. W. BUNTE (Ι95θ-ΐ97β) K. P. HÖLLER DR. INO. DR. RBH. NAT. DIPL. CHBM.

(oee> sTeeas

TBLBXl 82IBSOB ISAR D BAUERSTnABSB 22. 80OO MONCHBN

Munich, July 30, 1979

M / 20 233 M / 20 234

OLYMPUS OPTICAL CO., LTD. 43-2, 2-chome, Hatagaya
Shibuya-ku

Tokyo / Japan

POSTAL ADDRESS I POSTCACH TSO. D-SOOO MONCHBN

Ö30OO7 / OÖ35

The invention relates to a tape recorder, in particular a tape recorder that is set to recording and playback mode, when a moving chassis supporting a capstan shaft and reel shafts is raised.

For conventional tape recorders, for example cassette players for stereo systems in vehicles, so-called Staar systems are used in which a movable chassis is raised and a Kapstan shaft and a pair of reel shafts are inserted into recesses for the reel shafts of a cassette when it is inserted. In a known construction of this type, both the motor and the capstan shafts are arranged on the movable chassis, and an endless belt is stretched between the motor shaft and a capstan wheel for transmitting a rotating force. However, I rotate in this structure, the motor roller and the Kapstanrad j in a disadvantageous manner in the same direction, so that a rolling motion of the tape recorder may cause irregular rotations \. Recently, a tape recorder has been proposed that uses automatic reversal for a twin capstan system in which two flywheels rotate in opposite directions to produce an anti-roll effect. Although these ! Flywheels may have an anti-roll effect, because they are designed ^l so that they iw the same moment of inertia HA i ben is not taken any measure to the roles of the motor j counteract to. Hence, it is impossible to keep one satisfied- | to achieve an anti-roll effect. In addition, in the j known constructions of Staar systems, in which a loading; movable chassis is raised or lowered, the motor as well as the Kapstan shaft and the spool shafts are mounted on the movable chassis. The motor is so heavy that a large force is required to operate the movable chassis.

The inventor proposed an anti-roll mechanism at the flywheel and the motor roller are directly coupled to one another are to rotate in opposite directions,

030007/0835

where the moment of inertia Ip of the flywheel is as follows results in:

¹ F ^{= 1} M * " ^{= 1} M * <3Γ *

i ¹

Here are:

«= Moment of inertia of the motor

= Angular speed of the motor

= Angular speed of the flywheel

η = rotation ratio.

Although this mechanism has a satisfactory anti-roll effect generated, it is believed to be sensitive to irregular rotations due to deformation of a rubber jacket on the outer circumference of the flywheel, which can result after a longer period in the switched-off state, because the Flywheel is constantly pressed against the engine.

The invention is therefore based on the object of creating a tape recorder that has the explained disadvantages of known constructions no longer has.

To solve this problem, the tape recorder of the invention is designed so that the motor is anchored on the fixed chassis, so that the motor roller and the flywheel on the movable chassis in the non-operated state of the tape recorder from each other are disconnected while the flywheel is pressed against the engine roller to connect directly to the engine when the movable chassis is raised to the recording or playback position.

Further features and advantages of the invention result from calibration the following description of an embodiment that is shown in the drawing; In addition to the illustrated embodiment, other embodiments are of course

030007/0835

form at E _r-making possible.

Show it:

Figure 1 is a schematic side view of the main parts of a tape device according to a preferred embodiment the invention with lowered, movable chassis and

FIG. 2 shows a side view corresponding to FIG. 1 with the raised Chassis.

As can be seen from Figures 1 and 2, is a movable! Chassis 16 pivotable with the fixed by means of a pin 14

Chassis 12 of a tape device 10 connected. The movable | Chassis 16 is tensioned upward in the direction of the fixed chassis 12 by a tension spring 18. On the moving chassis 16, a pair of spool shafts 20 and a capstan shaft 22 are supported. The Kapstan shaft 22 is connected at its lower end to a flywheel 24, around the outer circumference of which a rubber jacket 26 is winding. j

I is a hook 28 in which an incision 27 is machined; pivotally connected to the fixed chassis 12 while a Engaging pin 30 protrudes from one side of the movable chassis 16. The hook 28 is represented by one shown in FIG Tension spring 32 is biased in the direction of the engagement pin 30, so that, as shown in Fig. 1, the movable chassis 16 by engaging the recess 27 on the engagement pin 30 in the lowered Position is held when the tape deck 10 is turned off. The hook 28 is also provided with a release tab 34 on the side of the incision 27 is provided. A motor 36 is arranged on the fixed chassis 12. Therefore im switched off State of the tape device 10, the flywheel 24 on the movable chassis 16 a distance from a motor roller 38 on the fixed chassis 12 so that the rubber jacket 26 on the

030007/0835

Flywheel 24 cannot be deformed. Since the motor 26 is not on the permanent chassis 16, but on the fixed chassis 12 is arranged, the force for operating the movable chassis 16 can be significantly less. Also is the arrangement of the motor 36 on the fixed chassis 12 from the viewpoint of vibration prevention and suppression of role influences very favorable.

The movable chassis 16 can be opened by pushing the release tab 34 through a compact cassette, i. H. when inserting a Tape cassette 40. When the engagement pin 30 ' comes out of engagement with the incision 27 by pressing against the release lug 34 against the force of the tension spring 32, rotates the movable chassis 16 moves around the pin 14 and comes to the upper position. The flywheel 24 is in this position is directly coupled to the motor 36 by its rubber jacket 26, and the rotational force of the motor 36 is applied to the capstan shaft 22 transfer. In this state for recording and playing back sounds, the motor roller 38 and the flywheel 24 are immediate connected to each other without a rubber belt or the like. Must be used, both in opposite directions Rotate direction to create an anti-roll effect. The switched-off state of the tape device 10 after the recording or playback is effected by detaching the tape cassette 40 and pushing the movable chassis 16 downward is so that the incision 27 of the hook 28 on the engagement pin 30 latches.

As explained, according to the invention, the motor 36 is on the fixed Chassis 12 arranged while the flywheel 24 on the movable Chassis 16 is provided and in the off state in which the movable chassis 16 is lowered from the Motor roller 38 on the fixed chassis 12 is separated. When the movable chassis 16 to turn on the recording or Playback mode B is raised, the flywheel 24 is pressed against the motor roller 38 for direct connection. There-

030007/0835

ago is even over a long period of time in which the tape device 10 is out of operation, the rubber jacket 26 of the flywheel 24 is not subjected to any compressive force and can therefore not be deformed will. In addition, the motor 36 and the flywheel 24 are directly connected to each other in opposite directions to rotate so that an anti-roll effect is achieved. After this the motor 36 is arranged on the fixed chassis 12, the starting force for the movable chassis 16 is reduced, so that the entire arrangement is much less susceptible to vibrations.

03ÖÖ07 / 0 835

Empty soap

Claims (3)

-r- $ 293,089 Claims Tape device that lifts a capstan shaft and reel shafts bearing, movable chassis comes into playback or recording state, characterized in that a motor (36) is arranged on a fixed chassis (12) that a flywheel (24) attached to the Kapstan shaft (22) in the in the non-operated state of the tape device is separated from a motor roller (38) connected to the output shaft of the motor (36) is connected, and that in the raised state of the movable chassis (16), i. H. when playing or recording of the tape device, "the flywheel (24) is pressed against the motor roller (38) for direct connection to the motor (36). 2. Tape device according to claim 1, characterized in that the movable chassis (16) is acted upon by first biasing means (18) in the sense of an upward movement that on a Side of the movable chassis (16) an engaging pin (30) is attached, wherein a second biasing means (32) acted upon, pivotally mounted on the fixed chassis (12) Hook (28) with an incision (27) in the sense of an engagement of the incision (27) with the engagement pin (30) is biased, and that the incision (27) and a Preigabenase (34) when pressed by a tape cassette (40) the Disengage the engagement pin (30) from the notch (27) provided on the same side of the hook (28) is. 3. Tape device according to claim 2, characterized in that the biasing means are tension springs (18, 32). 030007/0835